Reply by Wdwerker

A 5 sided corner cabinet that has 42” on the 2 wall sides can be a nightmare to get through doorways. The 5 sides look like a cross section of a diamond . 2 wall sides, 2 sides that are 90 degrees to the walls, and a diagonal face for your doors. I add a 6 th side by cutting the back corner parallel to the diagonal face. Measure all the doorways you have to go through from your shop to the final location, then build the parallel thickness an inch or 2 under the smallest doorway. The lower case might fit thru doors when you turn it on edge, so it could have a square corner in the back. The upper case being taller benefits from the back corner being clipped off at 45 degrees. 42” Corner cabinet shelfs eat up plywood pretty quick and the back corner can be out of reach. The shelf’s for the clipped back corner come out of a narrower strip of plywood allowing you to get more shelves per sheet.